本案例将学习运用LyScript计算特定程序中特定某些片段的Hash特征值，并通过xlsxwriter这个第三方模块将计算到的hash值存储成一个excel表格，本例中的知识点可以说已经具备了简单的表格输出能力，如果时间充裕完全可以实现自动化报告生成。
- 插件地址：https://github.com/lyshark/LyScript
第一步实现计算特定片段的特征值，此类代码实现原理用户传入一个rva相对地址以及读入指令长度，并通过内置的hashlib库实现计算内存段内指令的特征，如下代码先来实现计算两段指令特征。
代码语言：javascript复制import hashlib
import zlib,binascii
from LyScript32 import MyDebug
# 计算哈希
def calc_hash(dbg, rva,size):
read_list = bytearray()
ref_hash = { "va": None, "size": None, "md5":None, "sha256":None, "sha512":None, "crc32":None }
# 得到基地址
base = dbg.get_local_module_base()
# 读入数据
for index in range(0,size):
readbyte = dbg.read_memory_byte(base rva index)
read_list.append(readbyte)
# 计算特征
md5hash = hashlib.md5(read_list)
sha512hash = hashlib.sha512(read_list)
sha256hash = hashlib.sha256(read_list)
# crc32hash = binascii.crc32(read_list) & 0xffffffff
ref_hash["va"] = hex(base rva)
ref_hash["size"] = size
ref_hash["md5"] = md5hash.hexdigest()
ref_hash["sha256"] = sha256hash.hexdigest()
ref_hash["sha512"] = sha512hash.hexdigest()
ref_hash["crc32"] = hex(zlib.crc32(read_list))
return ref_hash
if __name__ == "__main__":
dbg = MyDebug()
connect = dbg.connect()
# 传入相对地址,计算计算字节
ref = calc_hash(dbg,0x19fd,10)
print(ref)
# 计算第二段
ref = calc_hash(dbg,0x1030,26)
print(ref)
dbg.close()计算后输出字典格式：
第二部使用第三方库，将读入的hash参数写出到表格内，并在下方生成hash图例，方便观察。
代码语言：javascript复制import hashlib
import time
import zlib,binascii
from LyScript32 import MyDebug
import xlsxwriter
# 计算哈希
def calc_hash(dbg, rva,size):
read_list = bytearray()
ref_hash = { "va": None, "size": None, "md5":None, "sha256":None, "sha512":None, "crc32":None }
# 得到基地址
base = dbg.get_local_module_base()
# 读入数据
for index in range(0,size):
readbyte = dbg.read_memory_byte(base rva index)
read_list.append(readbyte)
# 计算特征
md5hash = hashlib.md5(read_list)
sha512hash = hashlib.sha512(read_list)
sha256hash = hashlib.sha256(read_list)
# crc32hash = binascii.crc32(read_list) & 0xffffffff
ref_hash["va"] = hex(base rva)
ref_hash["size"] = size
ref_hash["md5"] = md5hash.hexdigest()
ref_hash["sha256"] = sha256hash.hexdigest()
ref_hash["sha512"] = sha512hash.hexdigest()
ref_hash["crc32"] = hex(zlib.crc32(read_list))
return ref_hash
if __name__ == "__main__":
dbg = MyDebug()
connect = dbg.connect()
# 打开一个被调试进程
dbg.open_debug("D:\Win32Project.exe")
# 传入相对地址,计算计算字节
ref = calc_hash(dbg,0x19fd,10)
print(ref)
ref2 = calc_hash(dbg,0x1030,26)
print(ref2)
ref3 = calc_hash(dbg,0x15EB,46)
print(ref3)
ref4 = calc_hash(dbg,0x172B,8)
print(ref4)
# 写出表格
workbook = xlsxwriter.Workbook("pe_hash.xlsx")
worksheet = workbook.add_worksheet()
headings = ["VA地址", "计算长度", "MD5", "SHA256", "SHA512","CRC32"]
data = [
[ref.get("va"),ref.get("size"),ref.get("md5"),ref.get("sha256"),ref.get("sha512"),ref.get("crc32")],
[ref2.get("va"), ref2.get("size"), ref2.get("md5"), ref2.get("sha256"), ref2.get("sha512"), ref2.get("crc32")],
[ref3.get("va"), ref3.get("size"), ref3.get("md5"), ref3.get("sha256"), ref3.get("sha512"), ref3.get("crc32")],
[ref4.get("va"), ref4.get("size"), ref4.get("md5"), ref4.get("sha256"), ref4.get("sha512"), ref4.get("crc32")]
]
# 定义表格样式
head_style = workbook.add_format({"bold": True, "align": "center", "fg_color": "#D7E4BC"})
worksheet.set_column("A1:F1", 15)
# 逐条写入数据
worksheet.write_row("A1", headings, head_style)
for i in range(0, len(data)):
worksheet.write_row("A{}".format(i 2), data[i])
# 添加条形图，显示前十个元素
chart = workbook.add_chart({"type": "line"})
chart.add_series({
"name": "=Sheet1!$B$1", # 图例项
"categories": "=Sheet1!$A$2:$A$10", # X轴 Item名称
"values": "=Sheet1!$B$2:$B$10" # X轴Item值
})
chart.add_series({
"name": "=Sheet1!$C$1",
"categories": "=Sheet1!$A$2:$A$10",
"values": "=Sheet1!$C$2:$C$10"
})
chart.add_series({
"name": "=Sheet1!$D$1",
"categories": "=Sheet1!$A$2:$A$10",
"values": "=Sheet1!$D$2:$D$10"
})
# 添加柱状图标题
chart.set_title({"name": "计算HASH统计图"})
# chart.set_style(8)
chart.set_size({'width': 500, 'height': 250})
chart.set_legend({'position': 'top'})
# 在F2处绘制
worksheet.insert_chart("H2", chart)
workbook.close()
# 关闭被调试进程
time.sleep(1)
dbg.close_debug()
dbg.close()生成后的图例效果如下：
